If you choose to bundle coolant with this package there are two different types. The 2002-2007 cars use Subaru green coolant which needs to be mixed with distilled water. If you choose this option you will receive 1 gallon of green Subaru coolant and 1 bottle of Subaru cooling system conditioner. The 2008+ cars use Subaru Super Blue coolant. This coolant does not require cooling system conditioner. It is premixed with water, so you will need two gallons of it. If you choose this option you will receive 2 gallons of Subaru Super Blue Coolant.